Rocky Mounts BrassKnuckles Roof Rack. With cargo space in cars precious as well as the complexity in removing front wheels that utilize thru axles, many cyclists are opting for wheels on bike mounts with their vehicles. The Rocky Mounts BrassKnuckles Roof Rack is the epitome of simplicity when it comes to transportation of your beloved bicycles. Simply raise the arm, ratchet down against the forkfront wheel, secure the wheel straps, and drive away with confidence. For the ultimate in versatility, the rack's mounting hardware makes it compatible with most crossbars such as Thule and Yakima as well as all factory installed crossbars. Besides the ease of use, the rack folds perfectly flat for a quiet, fuel efficient drive when there is no bike on the rack. Your carbon road bike or 29 trail bike will be in good hands with BrassKnuckles. The BrassKnuckles Roof Rack is locking enabled, but the lock cores are not included and must be purchased separately. The rack requires two lock cores so the Rocky Mounts Lock Cores 2 Pack Nashbar item RM LC2 is just what you need for locking capability to lock both the rack to the vehicle and the bike to the rack.